MFC 获取所有USB设备列举所有USB设备列举所有USB HUB

本文链接：https://blog.youkuaiyun.com/my_angle2016/article/details/84649423

本文介绍了一种使用Windows API函数来枚举系统中所有USB设备的方法，包括获取设备接口信息、设备详细信息，以及如何解析USB设备路径以提取Vendor ID (VID) 和Product ID (PID)。

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获取所有USB设备，列举所有USB设备

#include <INITGUID.h>
#include <setupapi.h>
#pragma comment(lib, "setupapi.lib")
#define MY_USB_PID_VID _T("VID_1111&PID_2222")

DEFINE_GUID(GUID_DEVINTERFACE_USB_DEVICE,
0xA5DCBF10L, 0x6530, 0x11D2, 0x90, 0x1F, 0x00, 0xC0, 0x4F, 0xB9, 0x51, 0xED);
#define GUID_CLASS_USB_DEVICE GUID_DEVINTERFACE_USB_DEVICE

DEFINE_GUID(GUID_DEVINTERFACE_USB_HUB,
0xf18a0e88, 0xc30c, 0x11d0, 0x88, 0x15, 0x00, 0xa0, 0xc9, 0x06, 0xbe, 0xd8);
#define GUID_CLASS_USB_HUB GUID_DEVINTERFACE_USB_HUB

//枚举所有usb设备
BOOL CMFCApplication1Dlg::EnumUSBDevice(OUT char acDevPath[MAX_PATH][MAX_PATH], OUT int &nDevNum)
{
   //入参检测
   nDevNum = 0;
   if (NULL == acDevPath)
       return FALSE;

   ZeroMemory(acDevPath, sizeof(acDevPath));
   BOOL bRet = FALSE;
   SP_DEVICE_INTERFACE_DATA DeviceInterfaceData; // 保存设备接口信息
   DWORD dwRequiredSize = 0; // 得到详细信息时需要的内存大小
   PSP_INTERFACE_DEVICE_DETAIL_DATA pDeviceDetailData = NULL; // 详细信息
   HDEVINFO hDeviceInfo; // 设备信息集合的指针
   GUID InterfaceGUID = GUID_CLASS_USB_DEVICE;
   DeviceInterfaceData.cbSize = sizeof(SP_DEVICE_INTERFACE_DATA);

   // 枚举设备
   int i = 0;
   hDeviceInfo = SetupDiGetClassDevs(&InterfaceGUID, NULL, NULL, DIGCF_DEVICEINTERFACE|DIGCF_PRESENT);
   if (hDeviceInfo == INVALID_HANDLE_VALUE)
       return FALSE;

   while (1)
   {
       bRet = SetupDiEnumDeviceInterfaces(hDeviceInfo, NULL, &InterfaceGUID, i++, &DeviceInterfaceData);
       if(!bRet)
           break;

       // 下面需要得到Interface的详细信息
       // 先得到详细信息需要的内存大小
       bRet = SetupDiGetDeviceInterfaceDetail(hDeviceInfo, &DeviceInterfaceData, NULL, 0, &dwRequiredSize, NULL);
       if(bRet)
           break;

       // 为详细信息分配内存
       if(pDeviceDetailData)
       {
           free(pDeviceDetailData);
           pDeviceDetailData = NULL;
       }
       pDeviceDetailData = (PSP_INTERFACE_DEVICE_DETAIL_DATA)malloc(dwRequiredSize);
       if(pDeviceDetailData == NULL)
           break;

       // 得到Interface的详细信息
       pDeviceDetailData->cbSize = sizeof(SP_INTERFACE_DEVICE_DETAIL_DATA);
       SP_DEVINFO_DATA DeviceInfoData;
       DeviceInfoData.cbSize = sizeof(SP_DEVINFO_DATA);
       bRet = SetupDiGetDeviceInterfaceDetail(hDeviceInfo, &DeviceInterfaceData, pDeviceDetailData, dwRequiredSize, &dwRequiredSize,
           &DeviceInfoData);
       if (!bRet)
           break;
       strcpy(acDevPath[nDevNum], pDeviceDetailData->DevicePath);
       nDevNum++;
   }
   if(pDeviceDetailData)
   {
       free(pDeviceDetailData);
       pDeviceDetailData = NULL;
   }
   SetupDiDestroyDeviceInfoList(hDeviceInfo);
   return TRUE;
}

void CMFCApplication1Dlg::OnBnClickedButton1()
{
CString sDevPath, svid, spid,str1,str2;
   char acDevPath[MAX_PATH][MAX_PATH];
   int nDevNum = 0;
   if(EnumUSBDevice(acDevPath, nDevNum))
   {

       for (int i=0; i<nDevNum; i++)
       {
           //解析usb设备路径中的vid和pid
           sDevPath =acDevPath[i];
           sDevPath = sDevPath.Right(sDevPath.GetLength()-sDevPath.Find('#')-1);
           sDevPath = sDevPath.Left(sDevPath.Find('#'));
           svid = sDevPath.Left(sDevPath.Find('&'));
           svid = svid.Right(svid.GetLength()-4);
           spid = sDevPath.Right(sDevPath.GetLength()-sDevPath.Find('&')-1);
           spid = spid.Right(spid.GetLength()-4);